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Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Snow Cover Partial
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
Trail Flow (Ridden Direction)
Trailforks scans users ridelogs to determine the most popular direction each trail is ridden. A good flowing trail network will have most trails flowing in a single direction according to their intension.
The colour categories are based on what percentage of riders are riding a trail in its intended direction.
  • > 96%
  • > 90%
  • > 80%
  • > 70%
  • > 50%
  • < 50%
  • bi-directional trail
  • no data
Trail Last Ridden
Trailforks scans ridelogs to determine the last time a trail was ridden.
  • < 2 days
  • < 1 week
  • < 2 weeks
  • < 1 month
  • < 6 months
  • > 6 months
Trail Ridden Direction
The intended direction a trail should be ridden.
  • Downhill Only
  • Downhill Primary
  • Both Directions
  • Uphill Primary
  • Uphill Only
  • One Direction
Contribute Details
Colors indicate trail is missing specified detail.
  • Description
  • Photos
  • Description & Photos
  • Videos
Trail Popularity ?
Trailforks scans ridelogs to determine which trails are ridden the most in the last 9 months. Trails are compared with nearby trails in the same city region with a possible 25 colour shades. Think of this as a heatmap, more rides = more kinetic energy = warmer colors.
  • most popular
  • popular
  • less popular
  • not popular
ATV/ORV/OHV Filter
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US Cell Coverage
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Radar Time
x Activity Recordings
Trailforks users anonymized public ridelogs from the past 6 months.
  • mountain biking recent
  • mountain biking (>6 month)
  • hiking (1 year)
  • moto (1 year)
Activity Recordings
Trailforks users anonymized public skilogs from the past 12 months.
  • Downhill Ski
  • Backcountry Ski
  • Nordic Ski
  • Snowmobile
Winter Trails
Warning A routing network for winter maps does not exist. Selecting trails using the winter trails layer has been disabled.
x Missing Trails
Most Popular
Least Popular
Trails are colored based on popularity. The more popular a trail is, the more red. Less popular trails trend towards green.
Jump Magnitude Heatmap
Heatmap of where riders jump on trails. Zoom in to see individual jumps, click circles to view jump details.
Trails Deemphasized
Trails are shown in grey.
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      No description for Alpine has been added yet! Login or register to submit one.
      Activities Click to view
      Region Details
      • 3
      • 6
      • 17
      • 12
      • 4

      Region Status
      Open as of Apr 19, 2024
      Local Trail Association

      Stats

      Avg Trail Rating
      Trails (view details)
      42
      Trails Mountain Bike
      42
      Trails Hike
      29
      Trails Trail Running
      29
      Total Distance
      22 miles
      Total Descent
      6,935 ft
      Total Vertical
      1,778 ft
      Highest Trailhead
      2,823 ft
      Reports
      164
      Photos
      227
      Ridden Counter
      2,645
      Sub Regions

      Recent Ride Log Activity in Region

      Today
      • 0 rides
      Yesterday
      • 0 rides
      Past Week
      • 4 rides

      Photos of Alpine Mountain Bike

      trail: Run 3
      39 |
      May 22, 2022 @ 2:25pm
      May 22, 2022
      trail: Run 3
      27 |
      May 22, 2022 @ 2:24pm
      May 22, 2022
      trail: The Ruins
      31 |
      May 22, 2022 @ 2:23pm
      May 22, 2022
      trail: Run 3
      30 |
      May 22, 2022 @ 2:15pm
      May 22, 2022
      11 |
      May 22, 2022 @ 2:15pm
      May 22, 2022
      trail: Mainline
      20 |
      May 22, 2022 @ 2:15pm
      May 22, 2022
      trail: Big Momma DH
      41 |
      May 22, 2022 @ 2:14pm
      May 22, 2022
      trail: Big Momma DH
      35 |
      May 22, 2022 @ 2:14pm
      May 22, 2022

      Videos of Alpine Mountain Bike

      Shredding Anderson Truck Trail
      5:04 | 264 | Sep 25, 2015
      6-13-15 Anderson Truck Trail Hero dirt
      12:09 | 227 | Jun 13, 2015
      Fontana Cal State Series Rd 2. Run 2. Warren Bower
      trail: Run 2
      2:06 | 358 | Jun 7, 2015
      Fontana Cal State Series Rd 2. Run 1. Warren Bower
      trail: Run 1
      2:16 | 191 | Jun 7, 2015
      Noble Canyon 5/3/2015
      trail: Run 2
      5:53 | 148 | May 4, 2015
      FONTANA CITY NATIONAL'S FINAL RUN 3-22-2015
      trail: Run 3
      2:51 | 259 | Mar 23, 2015
      4gs-Ryan Run. 1 Year of Downhilling
      trail: Run 1
      1:49 | 106 | Feb 24, 2015
      Andos 2/7/15
      14:00 | 336 | Feb 7, 2015

      Recent Trail Reports

      Activity Feed

      usernameactiontypetitledate
      Shanevictor88wishlistregionactivity #52772512
      May 18, 2024 @ 8:49am
      May 18, 2024
      cedenburnaddreportactivity #51403957 and 4 more
      Apr 19, 2024 @ 1:12pm
      Apr 19, 2024
      ridetime4wishlisttrailactivity #51281793
      Apr 16, 2024 @ 1:10pm
      Apr 16, 2024
      Wolfman4wishlistregionactivity #51066617
      Apr 11, 2024 @ 11:35pm
      Apr 11, 2024
      Blutzzzwishlistregionactivity #50776237
      Apr 3, 2024 @ 4:20pm
      Apr 3, 2024

      Recent Comments

      usernametypetitlecommentdate
      AlDyertrailThe RuinsJ
      Oct 16, 2022 @ 2:22pm
      Oct 16, 2022
      Miggi23trailOlivewoodIf you start at the school you start with a...
      Jan 22, 2022 @ 9:08am
      Jan 22, 2022
      360ridertrailAnderson Truck TrailThe road is closed
      Jun 16, 2018 @ 3:02pm
      Jun 16, 2018
      W33bletrailridge to ridgeThese trails are in serious need of some...
      Dec 29, 2017 @ 4:42pm
      Dec 29, 2017
      W33bletrailThe RuinsThese trails are in serious need of some...
      Dec 29, 2017 @ 4:42pm
      Dec 29, 2017

      Local Badges


      Activity Type Stats

      activitytypetrailsdistancedescentdescent distancetotal verticalratingglobal rankstate rankphotosreportsroutesridelogs
      Mountain Bike4222 miles6,936 ft15 miles1,778 ft
      #2,322#1,14722716413,748
      Hike2918 miles4,088 ft12 miles1,778 ft
      #1,821#1,030162298
      Trail Running2918 miles4,088 ft12 miles1,778 ft
      #1,833#1,031162311
      • By SoCal-AM & contributors
      • Admins: SDMBA
      • #8892 - 5,436 views

      Downloading of trail gps tracks in kml & gpx formats is enabled for Alpine.
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